title: Evaluation of dairy cattle manure as a supplement to improve net energy gain in fermentative hydrogen production from sucrose.
abstract: This study evaluated fermentative biohydrogen production from sucrose supplemented with dairy cattle manure at different sucrose:manure ratios. Hydrogen yields found in this study (2.9-5.3M hydrogen/M sucrose) at ambient temperature are higher than literature results obtained at mesophilic temperatures. This study demonstrated that dairy cattle manure could serve as a buffering agent to maintain recommended pH levels; as a nutrient source to provide the required nutrients for hydrogen production; as a seed to produce hydrogen from sucrose; and as a co-substrate to improve the hydrogen yield. Based on an analysis of the net energy gain, it is concluded that positive net energy gains can be realized with non-thermal pretreatment and/or by combining dark fermentation with anaerobic digestion or microbial fuel cells to extract additional energy from the aqueous products of dark fermentation.
authors.affiliation: Civil Engineering Department, New Mexico State University, Las Cruces, NM 88003, USA.
authors.forename: Karnayakage Rasika J
authors.initials: KR
authors.lastname: Perera
authors.forename: Nagamany
authors.initials: N
authors.lastname: Nirmalakhandan
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D001674:Bioelectric Energy Sources; D001709:Biotechnology / Q000379:methods*; D002021:Buffers; D002417:Cattle; D003612:Dairying; D003624:Darkness; D004560:Electricity; D005285:Fermentation / Q000502:physiology*; D006859:Hydrogen / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D008372:Manure / Q000032:analysis*; D013395:Sucrose / Q000378:metabolism*; D013816:Thermodynamics
chemical_list: D002021:Buffers; D008372:Manure; D013395:Sucrose; D006859:Hydrogen